Numerical Simulation of Sandstone Degradation under Freeze-Thaw Cycles with Grain-Based Model

TY - GEN

T1 - Numerical Simulation of Sandstone Degradation under Freeze-Thaw Cycles with Grain-Based Model

AU - Huang, C.

AU - Zhu, C.

AU - Ma, Y.

N1 - Publisher Copyright: © 2023 57th US Rock Mechanics/Geomechanics Symposium. All Rights Reserved.

PY - 2023

Y1 - 2023

N2 - In this study, the grain-based model (GBM) is used to evaluate the influence of freeze-thaw cycles (FTCs) action on the mechanical properties of sandstone. Five mineral components of sandstone are built in the numerical model based on GBM. To explore the influence of FTCs, water particles are distributed on the boundaries of different mineral components. Inter-particle heat conduction module captures the heat transfer process, resulting in temperature redistributions and the development of thermal strains. A modified elastoplastic model is used to capture the accumulation of residual strain that occurred during the ice-water phase change. The micro-cracks in sandstone samples after FTCs reflect the damage caused by FTCs. The uniaxial compressive test is carried out to evaluate the deterioration of FTCs on uniaxial compressive strength (UCS) and Young's modulus of sandstone specimens. Furthermore, it is found that the brittleness of sandstone is decreased with the increasing freeze-thaw cycles. These numerical results prove that the GBM developed in this study can be used to capture the deteriorative effects of FTCs on sandstone. This study provides a better understanding of the influence of FTCs on the mechanical properties of sandstone, which might be helpful for the design and assessment of climate-resilient infrastructure.

AB - In this study, the grain-based model (GBM) is used to evaluate the influence of freeze-thaw cycles (FTCs) action on the mechanical properties of sandstone. Five mineral components of sandstone are built in the numerical model based on GBM. To explore the influence of FTCs, water particles are distributed on the boundaries of different mineral components. Inter-particle heat conduction module captures the heat transfer process, resulting in temperature redistributions and the development of thermal strains. A modified elastoplastic model is used to capture the accumulation of residual strain that occurred during the ice-water phase change. The micro-cracks in sandstone samples after FTCs reflect the damage caused by FTCs. The uniaxial compressive test is carried out to evaluate the deterioration of FTCs on uniaxial compressive strength (UCS) and Young's modulus of sandstone specimens. Furthermore, it is found that the brittleness of sandstone is decreased with the increasing freeze-thaw cycles. These numerical results prove that the GBM developed in this study can be used to capture the deteriorative effects of FTCs on sandstone. This study provides a better understanding of the influence of FTCs on the mechanical properties of sandstone, which might be helpful for the design and assessment of climate-resilient infrastructure.

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U2 - 10.56952/ARMA-2023-0377

DO - 10.56952/ARMA-2023-0377

M3 - Conference contribution

T3 - 57th US Rock Mechanics/Geomechanics Symposium

BT - 57th US Rock Mechanics/Geomechanics Symposium

PB - American Rock Mechanics Association (ARMA)

T2 - 57th US Rock Mechanics/Geomechanics Symposium

Y2 - 25 June 2023 through 28 June 2023

ER -